Scraper



Feb. 3, 1942. H 2,272,006

SCRAPER Filed April 12, 1940 3 Sheets-Sheet 1 INVENTOR Elmer-A. Hyer BY ATTORNEYS Feb. 3, 1942. E. A. HYER 2,272,006

SCRAPER Filed-April 12, 1940 3 Sheets-Sheet 2 N jg b in &

I a I\ INVENTOR EZmerA.Hyer BY ATTO R N EYS Feb. 3, 1942. E. A. HYER 2,272,006

SCRAPER Filed April 12, 1940 3 Sheets-Sheet 3 INVENTOR Elm erA .Hyer

A'ITORNEYS Patented Feb. 3, 1942 r hereinafter described such is "used q extends downwardly from said apexl'to a connection with crosslp mxza. In this' manner relatively light and widely spaced side beams may' begu sed, while maintaining the frame amply' rigid forhard ser'vi-ceiand relatively heavy loads. y

j-iDis-p'osed in the frame between beams 2' and dischargeeasily andcompletely without extreme lift and at any leveling angle of the bowl so that very close leveling may be effected, coupled with a complete discharge from the'bowl; with'a single" setting or adj u'stment-o'f the bowl.

A further object of the'invention is to 'produce f a simple and inexpensive device and yet one This includes 'relativelylong side plates 8and a bottom-plate '9 extending rearwardly and upward-f 1y on an easy curve from the depending blade I ll; to a pointnearthe top of the side-plates; from which -point upwardly the curvature becomes; I

' more abrupt and practically vertical. {Theside which will be exceedingly effective for the purpose for which it is designed.

' These objects I accomplish by means of su ch structure and relative" arrangement "of parts as will fully appear by a perusal 1 of specification and claims; A x In the drawings similarcharacters of reference indicate corresponding parts in the several views: 7

am-z on ears [3 rigid with and dependingffrom the bowl in a scraping position. V Figure 2 is a sectional elevation with the bowl tilted to a full dump position.

Figure 3 is a top plan view'withthe bowlinthe positionofFig. 1. 1 v r Referring now more particularly to thecharacters of reference on the drawings, the frame of the scraper includes horizontal side beams vl con- Figure l is a side elevation 'of the scraper with:

t erenewin of the scraper 7 nected at intervals by cross beams which include between beams 2 and 2a and'then converge to a connection with a vertical clevis plate 3 adapted for supported connection at different levels with the drawbar clevis of a tractor as is common practice. The side beams at their rear end are supported by wheels 4 disposed outside said beams.

The side beamsare braced against lateral or vertical deflection by an upstanding trussstructure which comprises pairs of brace-beams 5 pro jecting upwardly from the side beams l at their rear end and adjacent cross beam, in converging relation to each other both laterally and 1ongitudinally of the frame to a central apex above the side beams substantially midway between the cross beams 2 and 2a. A central longitudinal brace beam 6 extends from said apex forwardly to a connection with plate 3. beam 1, which serves both as a brace andas a means to support the hydraulic operating unit Another central plates project ahead of the blade some distance so ast'o' form dirt deflecting wings. I

"Thebowl'is mounted at its forward end ini'connection with the side beams l}by tension arms I I I which are rig-idly secured on theinner face of'the side plates and project fc'ar'wa-rdly from the same a short distance at alevel "well belo'wfthe center .ofheigh't of-the bowl. 1

At their forward end, th arms are pivoted "as beams l ju'st rearwardly of crossbeam l The axis of swinging of the bowl is thus'relativelylow and close to thz'z'blade, so that comparatively little tilting movement of the bowl will sufiice tot withs ame inalevelingpositions g I 'This specificmountim arrangement also disdrawlthe blade from the ground and place the tributes the wei-ght of the loadso'that a minimum of powerapplied to the bowl at its rear end; will suffice to tilt the same upwardly to control the leveling position of theblade;

A conventional cable control maybe used for the purpose, but for tractors equipped with a fluid pressure generating apparatus I preferably use the hydraulic unit shown. This comprises a I hydraulic cylinder l4 extending lengthwise of and securely strapped or otherwise secured on the brace beam I on its back side. The piston rod l5, projecting from the upper end of the cylinder, is pivotally connected'at .itsupper end to a pair of depending links I S: which are-disposed on oppositesides of the cylinder and'beam- 5 and are pivoted atvtheir lower end on ears I! projecting I from'the bottom plate of the bowl a short distance from its upper end.

. The bowl tends-todrop of its own weight to a digging position, the depth of'diggingbeingcontrolled by the extent to which the piston is allowed to lower inthe cylinder, and independently to some extent by altering the level on plate 3 at which connection is made with th tractor.

Owing to the specific upward incline of the bottom plate from the blade, even when the bowl is in digging position, the dirt will readily discharge from the bowl when the latter is tilted only sufficient to dispose the blade in a close leveling position relative to the ground.

The depth of the bowl is such that a considerable load of dirt may beactually carried free of the ground rather than being shoved bodily along as is generally the case with a leveler. This feature of course considerably reduces the load on the tractor and the strains on the scraper frame and other parts, and reduces loss of dirt by spillage from the sides when the dirt is being moved from the point of scraping to the charge and leveling.

The truss structure projects above the side beams a sufficient distance to enable the back of the bowl to be raised so as to dispose the bowl at a steep angle if desired for charge, as shown in Fig. 2.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of -the inven-. tion as set forth herein;

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form adeparture from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secureby Letters Patent is:

1. A leveling scraper comprising a frame supported for movement along the ground, a bowl hung in the frame for upward tilting movement at the rear, said frame including sidebeams and an upwardly extending truss structure including brace members converging to av central apex above the bowl from longitudinally spaced point in the length of the beams beyond the area occupied by the bowl.

2. A leveling scraper comprising a frame supported for movement along the ground, a bowl hung in the frame for upward tilting movement at the rear, said frame including side beams and an upwardly extending truss structure which includes a pair of longitudinal'centrally disposed brace members converging upwardly to an apical connection from longitudinally spaced points on the frame and other brace members diverging very fast dispoint of dislaterally and longitudinally of the frame from said connection to points on the side beams spaced longitudinally of the frame from each other and from the frame ends of the first named brace members.

3. A leveling scraper comprising a frame supported for movement along the ground, a bowl hung in the frame for upward tilting movement at the rear, said frame including side beams and an upwardly extending truss structure which includes pairs of brace members diverging from each other both laterally and longitudinally of the frame from an apex above and centrally of the width of the frame to connections with the side beams at longitudinally spaced points thereon, and a central longitudinal member extending forwardly from said apex to a connection with the frame ahead of the connection of the first named members with the side beams.

4. A scraper comprising a frame supported for movement along the ground, a bowl hung in the frame for upward tilting movement at the rear, a rigid member mounted on the frame rearwardly of the bowl and upstanding from the frame in clearance relation to said bowl, a hydraulic cylinder mounted on said member lengthwise thereof, a piston rod projecting upwardly from the cylinder, and a link pivotally connected at one end on the piston rod and depending therefrom to pivotal connection at its lower end on the bowl at the back; the upper end of the link overhanging the bowl and the lower end portion thereof curving forwardly to said pivotal connection with the bowl and in clearance relation to the back of the bowl;

5. A scraper comprising a frame supported for movement along the ground, a bowl hung in the frame for upward tilting movement at the rear, a rigid member mounted on the frame rearwardly of the bowl and upstanding from the frame in clearance relation to said bowl, a hydraulic cylinder mounted on said member lengthwise thereof, a piston rod projecting upwardly from the cylinder, spaced parallel links pivoted at one end on the piston rod and depending therefrom to pivotal connection at the other end on the bowl at the back; said member having a forward slope, and the links being disposed on opposite sides of said member and intersecting the same intermediate their ends.

ELMER A. I-IYER. 

